Complete SQL Interview Questions in One Shot | Placement Revision | Structured Query Language

🔹Notes: https://www.gatesmashers.com/resource... Complete SQL Roadmap 🚀: https://www.gatesmashers.com/roadmaps... 00:00 Q-1: Write a query to display all Engineering employees ordered by salary from highest to lowest. 05:40 Q-2: Write a query to find the number of employees in each department. 08:50 Q-3: Write a query to find the second-highest distinct salary. 11:02 Q-4: Write a query to find employees earning more than the company average salary. 11:56 Q-5: Write a query to find the highest salary in each department. 13:55 Q-6: Write a query to find employees whose salary is higher than their manager salary. 17:31 Q-7: Write a query to display each order with the customer name. 19:50 Q-8: Write a query to find customers who have never placed an order. 21:43 Q-9: Write a query to find customers who placed more than one order. 24:28 Q-10: Write a query to find the highest-spending customer based only on delivered orders. 26:36 Q-11: TRUNCATE vs DELETE — Remove all rows quickly while keeping the table. 28:15 Q-12: GRANT SELECT — Give an intern read-only access to the Employees table. 30:05 Q-13: SQL Logical Execution Order — Why can't SELECT aliases be used in WHERE? 31:55 Q-14: ROW_NUMBER() vs RANK() vs DENSE_RANK() 33:50 Q-15: COUNT(*) vs COUNT(email) vs COUNT(DISTINCT email) 35:54 Q-16: COALESCE() — Return the first available non-NULL value. 38:06 Q-17: LAG() — Find each user's previous login date. 42:45 Q-18: CASE — Classify employees into Low, Medium, and High salary bands. 43:45 Q-19: NULLIF() — Prevent divide-by-zero errors. 45:22 Q-20: Delete duplicate records while keeping the newest record for each email. 🚀 MASTER COMPUTER SCIENCE | INTERVIEWS | EXAMS Gate Smashers — Learn Computer Science through free lectures, structured playlists, interview resources, important questions, notes & exam preparation. 💻📚 🌐 FREE CS RESOURCES & INTERVIEW PREPARATION : https://gatesmashers.com ━━━━━━━━━━━━━━━━━━━━━━ 📚 SUBJECT-WISE COMPUTER SCIENCE PLAYLISTS ► Placement Interview Questions:    • Placement Interview Questions | One Shot S...   ► System Design:    • System Design   ► Deep Learning:    • Deep Learning (ANN, RNN, Tranformers, RNN)   ► Machine Learning:    • Machine Learning   ► Design and Analysis of Algorithms (DAA):    • Design and Analysis of algorithms (DAA)   ► Software Engineering:    • Software Engineering   ► Database Management System (DBMS):    • DBMS (Database Management system) Complete...   ► Cloud Computing:    • Cloud Computing (Complete Course)   ► Theory of Computation (TOC):    • TOC(Theory of Computation)   ► Artificial Intelligence:    • Artificial Intelligence (Complete Playlist)   ► Computer Networks (CN):    • Computer Networks (Complete Playlist)   ► Operating System (OS):    • Operating System (Complete Playlist)   ► Structured Query Language (SQL):    • Structured Query Language (SQL)   ► Discrete Mathematics:    • Discrete Mathematics   ► Compiler Design:    • Compiler Design (Complete Playlist)   ► Number System:    • Number system   ► Programming in C:    • C Programming   ► Data Structures:    • Data Structure   ► Computer Architecture:    • Computer Organization and Architecture (Co...   ► Graph Theory:    • Graph Theory   ► Digital Logic:    • Digital Logic (Complete Playlist)   ━━━━━━━━━━━━━━━━━━━━━━ 🌐 CONNECT WITH GATE SMASHERS ► Website: https://gatesmashers.com ► YouTube:    / gatesmashers   ► Instagram:   / gate.smashers   ► Telegram: https://t.me/gatesmashersofficial ► Facebook:   / gatesmashers   ► Threads: https://threads.net/@gate.smashers GsetGo ► YouTube:    / @gsetgoofficial   ► Instagram:   / gsetgo_   VarunNainaShots ► YouTube:    / @varunainashots   ► Instagram:   / varunainashots   ━━━━━━━━━━━━━━━━━━━━━━ Subscribe to Gate Smashers and start your Computer Science learning journey today! 🚀💻